dead-weight safety valve
[机] 重码安定阀
double safety valve
[化] 双安全阀
lever safety valve
[机] 杠杆安全阀
multiple safety valve
[化] 多重安全阀
open-spring (loaded) safety valve
[化] 开启式弹簧安全阀
pop safety valve
[化] 紧急安全阀; 快泄安全阀
secondary safety valve(for inner container)
[化] 二级安全阀(供内容器用)
spring safety valve
[化] 弹簧安全阀
